COLL 287 |
| We have developed a novel synthesis route for different nitrogen dopant concentration in ceramics nanoparticles. A series of N-doped ceramics nanoparticles (CeO2, WO3, and V2O5) have been prepared by the direct amination of precursors. The crystal phase, particles size and degree of nitrogen incorporation have been investigated using X-ray diffraction (XRD), transmission electron spectroscopy (TEM) and X-ray photoelectron spectroscopy. The high relative photocatalytic activity of these N-doped ceramics nanoparticles were evaluated by photodecomposition of methylene blue under the irradiation of a standard UV-vis light source. The ease and degree of substitutional-insertional nitrogen doping is held accountable for the significant increase in photocatalytic activity in these N-doped ceramics nanoparticles versus pure nanoparticles. It is suggested that the nitrogen incorporation produces an NO bonding region as evidenced by the resulting XPS spectrum. We also find that the band gap energies of these materials are of great importance to their photocatalytic performance. |
|
Catalytic Activity and Surface Characterization of Deposited Metal Nanoparticles and Polyparticles on Metal Oxides
6:00 PM-8:00 PM, Monday, August 20, 2007 BCEC -- East Registration, Poster
Division of Colloid & Surface Chemistry |